Ringworm can be treated with a few different remedies, depending on the severity of the case. A veterinarian may prescribe a medicated shampoo or an ointment to kill the fungus on a superficial level, while more severe cases may require the addition of oral medication.
Regardless of the type of treatment, relief of the symptoms and healing of the lesions can take from one to three weeks. During this time, remember that ringworm is very contagious. Try to keep the infected dog as isolated as possible, as the fungus can potentially spread to other pets or even family members in the household.
Continue to give the dog the vet-recommended treatment for the prescribed amount of time. Just because the physical symptoms seem to vanish does not mean that the fungus has been completely killed. The ointments or baths should be administered until the recommended dosage is used to ensure the fungus is completely eradicated. After the dog is cured, keep on the lookout for any recurring symptoms. Although the treatment can cure an active case of ringworm, it cannot serve as a repellent for future fungal contact. Preventative measures, such as good hygiene and environmental decontamination, should be taken so that the dog does not get ringworm again.